n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 51 |
4 | 304 |
5 | 1765 |
6 | 10104 |
7 | 57239 |
8 | 321248 |
9 | 1787337 |
10 | 9864040 |
11 | 54035707 |
12 | 294031632 |
13 | 1590368429 |
14 | 8556082136 |
15 | 45812239455 |
16 | 244255416256 |
17 | 1297362967441 |
18 | 6867617339592 |
19 | 36243304518083 |
20 | 190746485895920 |
21 | 1001394643462773 |
[0,1,8,51,304,1765,10104,57239,321248,1787337, 9864040,54035707,294031632,1590368429,8556082136, 45812239455,244255416256,1297362967441, 6867617339592,36243304518083,190746485895920, 1001394643462773] |